Increased self-priming pump suction method, how to improve the self-priming pump suction

Self-priming pump suction is not enough, what should I do? Self-priming pump suction lift the theoretical value is 10 meters, under normal circumstances can reach 7 - commonly Self-priming height 9 m, general practice for accuracy, power and other reasons, cannot reach this number, so the pump as long as in the number of the following bearing. If not reached the height of the actual application, usually we can use the following method to improve the increase self-priming pump suction:

1, no seal can be slightly narrow self-priming pump inlet pipe diameter, such as pump inlet pipe of 150 mm to 125 mm, can put the import pipeline also use 125 mm pipe, the pipe gets smaller after the pipe of the air inside will also drop, is like a mouth water through a straw with big straw must be as small straw bibulous effect is good, but should pay attention to is the import pipeline can only slightly narrowed, cannot export and import the configuration of the installation, so it will have no water absorption consequences.

2, self-priming pump suction pipe is equipped with suction bottom valve. Suction bottom valve is actually a check valve, it ensures that water can only be accessed from a pool of water suction pipe and can't return. So if the suction pipe full of water, while the height of the water pump shaft above the pool working level, but due to the function of absorbing water bottom valve, the water in the suction pipe will not flow into the pool, the water pipe is always full of water, to ensure that the pump can be active and flexible. The reliability of this method of suction influenced by the quality of the suction bottom valve. For example, sealing is not strict, leakage. The water in the suction pipe will gradually into the pool. Cause there is no water in the suction pipe, there is no water pump start-up, cause artificial irrigation.

under the self-priming pump inlet piping pool bottom valve, installed water intake can improve the suction of about 1 meter, with the purpose of the bottom valve is to prevent the inside of the suction pipe, water cut no self-priming pump seal the inside of the pipe in the process of imbibition water back under the action of atmospheric pressure influence self-priming pump self-priming performance.

3, reduce the feed water pipe bend, gap between height and horizontal interval. Reduce no seal on the self-priming pump inlet piping elbow, elbow quantity is less, the better, a suction elbow loss about 1 meter or so.

4, self-priming pump set before the pump suction tank. This demand on the pump suction pipe to set up a water tank, pump before the first run, the tank should be artificial filled with water, after the first run to suspend, because of the water tank inlet pipe height above the tube surface height, while in the pool water level below the height of the tank water, tank of water will not flow back, into the pool, so, the water of the water tank can storage will be, and since the outlet pipe of water tank, The pump suction pipe) Height below the tube surface height, so to ensure the pump suction tube filled with water, in the future when the pump running again, the water in the pitcher is draining water pump, tank negative pressure, the water in the pool under the action of atmospheric pressure, added to the water tank.

5, self-priming pump set vacuum pump in the pump suction pipe on the road, the pump before the launch, vacuum pump, first to make the pump suction tube filled with water first, ensure the pump active, agile. This kind of suction method needs a complete active control system to ensure the normal operation.

6, self-priming pump, check first to see when the device self-priming pump inlet pipe seal is complete, if there is a slim holes is similar with needle holes will not affect the self-priming pump suction sheung shui, after exclusion of self-priming pump inlet piping leakage is still do not go up to the water absorption, consider how to progress the self-priming pump self-priming function, first check the self-priming pump, pump shaft, bearing, impeller, seal and other parts to check the requirements and measures with horizontal centrifugal pump is the same, the difference is the gap of check and adjust.

7, you can also choose big suction no self-priming pump seal products such as large flow self-priming pump, under normal circumstances can achieve 7 - Self-priming height of 9 meters.

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